import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;

public class Demo2 {
    public static void main(String[] args) throws Exception,InterruptedException {
        Callable<Integer> callable=new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                int sum=0;
                for (int i=0;i<1000;i++){
                    sum+=i;
                }
                return sum;
            }
        };
        FutureTask<Integer> futureTask=new FutureTask<>(callable);
        Thread t=new Thread(futureTask) ;
        t.start();

        //后续通过 FutureTask来拿到结果
        System.out.println(futureTask.get());
    }
}
